Funding for this research was provided by:
Achievement Conversion and Guidance Project of Chengdu Science and Technology Bureau (2017-CY02-00027-GX)
First Online: 9 June 2020
Compliance With Ethical Standards
: The authors declare that they have no conflict of interest.
: This study was approved by the ethics committee of the relevant institutions.
: Informed consent was obtained from all individual participants included in the study.